CN114824389A - Preparation method of penta-hydrogen fuel cell membrane electrode and cell membrane electrode - Google Patents
Preparation method of penta-hydrogen fuel cell membrane electrode and cell membrane electrode Download PDFInfo
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- CN114824389A CN114824389A CN202110124005.5A CN202110124005A CN114824389A CN 114824389 A CN114824389 A CN 114824389A CN 202110124005 A CN202110124005 A CN 202110124005A CN 114824389 A CN114824389 A CN 114824389A
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
Abstract
The invention discloses a preparation method of a penta-hydrogen fuel cell membrane electrode and a membrane electrode, wherein the method comprises the following steps: coating anode catalyst slurry on an anode transfer medium; coating a cathode catalyst slurry on a cathode transfer medium; stacking the anode transfer medium, the cathode transfer medium, the anode sealing frame, the cathode sealing frame and the proton exchange membrane according to a preset sequence to form a stacking unit; carrying out thermal transfer printing treatment on the stacking unit to obtain a membrane electrode semi-finished product; stripping the anode transfer medium and the cathode transfer medium from the semi-finished product of the membrane electrode to obtain a membrane electrode of the penta-hydrogen fuel cell; the preparation method of the membrane electrode of the five-in-one hydrogen fuel cell and the membrane electrode realize the CCM transfer printing process and finish the edge sealing integration process, avoid the deformation problem of the proton exchange membrane caused by the secondary processes of the catalyst layer transfer and edge sealing integration process, have simple and easily realized process flow, high production efficiency and strong flexibility, and are suitable for the large-scale production of the membrane electrodes with different sizes.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cell membrane electrodes, in particular to a preparation method of a penta-hydrogen fuel cell membrane electrode and a cell membrane electrode.
Background
A hydrogen fuel cell is an energy conversion device capable of directly converting chemical energy stored in a fuel (hydrogen gas) and an oxidant (oxygen gas in air) into electric energy, and the basic operation principle thereof is the reverse process of electrolyzing water; the hydrogen fuel cell system is composed of an electric pile and an auxiliary subsystem, wherein the electric pile comprises a bipolar plate, an electrolyte, a catalyst and a gas diffusion layer, wherein the catalyst, a proton membrane material and the diffusion layer jointly form a Membrane Electrode Assembly (MEA), and the membrane electrode is a core component of the fuel cell and is a part for generating electric energy through electrochemical reaction of fuel and an oxidant, so that the membrane electrode of the fuel cell becomes the key for developing the continuous production process of the membrane electrode of the fuel cell.
The existing membrane electrode preparation process generally adopts an indirect method to prepare a membrane electrode or a direct method to prepare the membrane electrode, wherein the direct method to prepare the membrane electrode is always regarded as a production method for realizing large-scale, high-efficiency and convenient membrane electrode production, but the preparation method still has the following defects: the proton exchange membrane is sensitive to temperature and moisture, and when the catalyst is coated on the proton exchange membrane, substances contained in the catalyst can cause the proton exchange membrane to shrink or swell when the catalyst is coated on the proton exchange membrane, so that the rejection rate of the proton exchange membrane is high; the indirect method for preparing the membrane electrode is to coat a catalyst on a medium, and then transfer printing is carried out on a proton exchange membrane through hot pressing to prepare the membrane electrode, the process is fully verified through a large amount of marketization application, at present, the efficiency of the single-chip transfer printing process is very low, the roll-to-roll continuous transfer printing for producing CCM is a production mode with higher efficiency, and the capacity of the roll-to-roll is generally higher by more than one order of magnitude compared with the capacity of the sheet-to-sheet.
Chinese patent CN02283449.4 mainly discloses a membrane electrode structure of a fuel cell, which uses plastic with hot melt plastic or thermosetting rubber to form a sealing frame, and the sealing frame is arranged around an active region; the active region is formed by pressing a porous support material and a catalyst attached to the porous support material on two sides of the proton exchange membrane, and the thickness of the sealing region is the same as that of the active region. The technology has high sealing reliability and good manufacturability, saves the membrane material, but has long hot pressing time and low production efficiency.
Chinese patent CN20110431704.0 mainly discloses a method for manufacturing a fuel cell membrane electrode assembly by ultrasonic vibration bonding, first feeding a polymer electrolyte membrane and a sealing frame into an ultrasonic vibration applying device; bonding the sealing frame to edges of both sides of the polymer electrolyte membrane by ultrasonic vibration; coating electrode slurry on both sides of the polymer electrolyte membrane; the method can realize better sealing but also has the problem that a polymer electrolyte membrane is easy to swell and deform in the spraying process, and the spraying method is easy to spray the slurry on the sealing gasket, is not beneficial to positioning an active area and wastes catalyst slurry, so that how to effectively improve the efficiency and quality of the large-scale production of the membrane electrode becomes a research hotspot of technicians in the field.
In the prior art, a Catalyst is generally transferred to a proton exchange Membrane to obtain a 3-layer CCM (Catalyst Coated Membrane), and then a sealing frame is attached to the edge of the proton exchange Membrane, so that edge sealing integration is performed to obtain a 5-layer Membrane electrode with a frame, which inevitably causes the deformation problem of the proton Membrane and the alignment precision problem of the active area of a cathode and an anode due to secondary processes of Catalyst layer transfer and CCM edge sealing integration.
In addition, in order to obtain higher production efficiency, CCM is usually produced continuously by roll-to-roll process, if the cathode and anode catalyst layers are respectively and continuously coated or transferred on the two side surfaces of the proton exchange membrane coil to obtain continuous full black CCM, and then when the continuous full black CCM is cut into sheets for use, the edges of the CCM are very easy to cause micro overlapping of the cathode and anode catalysts due to cutting, thereby causing the short circuit between the cathode and the anode, causing the reduction of the electrical output performance of the fuel cell, and further affecting the service life of the fuel cell; if the surfaces of the two sides of the proton exchange membrane coiled material are coated or transferred with the cathode and anode catalyst layers at intervals, the problem of the alignment precision of the active areas of the cathode and the anode on the two sides of the proton exchange membrane exists.
There is therefore a need to find a solution to the above problems.
Disclosure of Invention
In view of the above, there is a need to overcome at least one of the above-mentioned drawbacks in the prior art, and the present invention provides a method for preparing a membrane electrode of a penta-hydrogen fuel cell, comprising the following steps: step S1, coating anode catalyst slurry on an anode transfer medium, and forming an anode catalyst layer on the anode transfer medium after drying; coating cathode catalyst slurry on a cathode transfer medium, and forming a cathode catalyst layer on the cathode transfer medium after drying;
step S2, stacking the anode transfer medium with the anode catalyst layer, the cathode transfer medium with the cathode catalyst layer, an anode sealing frame, a cathode sealing frame, and a proton exchange membrane in a predetermined order to form a stacking unit, where the predetermined order is: the upper layer is an anode sealing frame and the anode transfer medium with the anode catalyst layer arranged in the frame of the anode sealing frame, the middle layer is a proton exchange membrane, and the lower layer is a cathode sealing frame and the cathode transfer medium arranged in the frame of the cathode sealing frame; wherein the side dimension of the anode transfer medium is equal to the inside dimension of the anode sealing frame; the size of the side edge of the cathode transfer medium is equal to the size of the inner side edge of the cathode sealing frame; the sizes of the outer side edges of the anode sealing frame and the cathode sealing frame are both larger than or equal to the size of the side edge of the proton exchange membrane; the thickness of the anode sealing frame is equal to that of the anode transfer medium with the anode catalysis layer, and the thickness of the cathode sealing frame is equal to that of the cathode transfer medium with the cathode catalysis layer;
step S3, performing heat transfer printing treatment on the stacking unit to transfer the anode catalyst layer and the cathode catalyst layer to the two side surfaces of the upper side and the lower side of the proton exchange membrane respectively, and simultaneously pressing the anode sealing frame and the cathode sealing frame on the two side edges of the upper side and the lower side of the proton exchange membrane to obtain a membrane electrode semi-finished product;
and step S4, stripping the anode transfer medium and the cathode transfer medium from the membrane electrode semi-finished product to obtain the penta-hydrogen fuel cell membrane electrode.
According to the prior art in the background of the present patent, in the conventional membrane electrode preparation method, a catalyst is generally transferred to a proton exchange membrane to obtain a 3-layer CCM (catalyst coated membrane), and then a sealing frame is attached to the edge of the proton exchange membrane, so that edge sealing is integrated to obtain a 5-layer membrane electrode with a frame, which can cause the problems of catalyst layer transfer and proton membrane deformation and the problem of the alignment accuracy of the active areas of a cathode and an anode; the invention discloses a preparation method of a pentahapto hydrogen fuel cell membrane electrode, which is characterized in that an anode transfer medium with an anode catalyst layer, a cathode transfer medium with a cathode catalyst layer, an anode sealing frame, a cathode sealing frame and a proton exchange membrane are stacked according to a preset sequence, and then are subjected to heat transfer laminating treatment by a laminating machine to peel off the transfer medium, so as to obtain a 5-layer membrane electrode with a sealing frame, through a large number of experiments and researches, the material of the transfer medium, the base material and the material of the hot melt adhesive layer of the sealing frame, the solvent of the catalyst, the speed, the pressure, the roller diameter and the like during film laminating are comprehensively arranged, so that the edge sealing integration process is completed while the CCM transfer process is realized, the deformation problem of the proton exchange membrane caused by the secondary processes of catalyst layer transfer and edge sealing integration process is avoided, the process is simple and easy to realize, the production efficiency is high, the flexibility is strong, and the method is suitable for the large-scale production of membrane electrodes with different sizes.
In addition, the preparation method of the membrane electrode of the penta-hydrogen fuel cell disclosed by the invention also has the following additional technical characteristics:
further, the outer side dimensions of the anode sealing frame and the cathode sealing frame are equal to the side dimensions of the proton exchange membrane.
Further, the anode transfer medium and the cathode transfer medium are release films.
Further, the anode transfer medium is one of PET, PI or PEN polymer films coated with release agents; the cathode transfer medium is one of PET, PI or PEN polymer films coated with a release agent.
Further, the base material of the anode sealing frame is one of PET, PI or PEN polymer, and the adhesive layer covering the surface of the anode sealing frame material is a hot melt adhesive layer with an adhesive effect at 20-25 ℃; the base material of the cathode sealing frame is one of PET, PI or PEN polymer, and the adhesive layer covering the surface of the cathode sealing frame material is a hot melt adhesive layer with an adhesive effect at 20-25 ℃.
Furthermore, the base material of the anode sealing frame is PEN polymer; the base material of the cathode sealing frame is PEN polymer.
Furthermore, the glue layer covering the surface of the cathode sealing frame material is an EVA glue film with an adhesive effect at normal temperature (20-25 ℃); the adhesive layer covering the surface of the anode sealing frame material is an EVA adhesive film with adhesive function at normal temperature (20-25 ℃).
Further, the solvent of the cathode catalyst slurry comprises at least one of ethylene glycol, propylene glycol, butanediol, tert-butanol and pentanediol; the solvent of the anode catalyst slurry comprises at least one of ethylene glycol, propylene glycol, butanediol, tert-butyl alcohol and pentanediol; .
Further, in the step S1, the anode catalyst slurry is coated on the anode transfer medium by a Slot die Slot coater; the cathode catalyst slurry was coated on the cathode transfer media by a Slot die Slot coater.
Further, in the step S3, performing thermal transfer printing processing on the stacking unit through a film laminating machine to obtain the semi-finished membrane electrode, where upper and lower rollers of the film laminating machine are respectively a steel roller and a rubber roller, the thermal transfer printing speed is 1m/min to 10m/min, and the diameters of the rubber roller and the steel roller are 10mm to 100 mm; the laminating pressure of the laminating machine is 0.2MPa-0.5 MPa.
The upper roller and the lower roller of the laminating machine are respectively a steel roller and a rubber roller, the upper roller is a rigid roller, the lower roller is an elastic roller, and the upper roller and the lower roller are mutually matched through the two rollers, so that a workpiece can not be damaged, certain transfer pressure is guaranteed, and the transfer rate is effectively improved.
Furthermore, the thermal transfer printing speed is 2m/min, the diameters of the rubber roller and the steel roller are 50mm, and the laminating pressure of the laminating machine is 0.3 Mpa.
Furthermore, the proton exchange membrane is a coiled material, the anode sealing frame is a coiled material, a plurality of anode inner frames are arranged on the anode sealing block at intervals, the size of the side edge of each anode inner frame is equal to that of the anode transfer medium, the size of the outer side edge of the anode sealing frame is equal to that of the proton exchange membrane, the cathode sealing frame is a coiled material, a plurality of cathode inner frames are arranged on the cathode sealing block at intervals, the size of the side edge of each cathode inner frame is equal to that of the cathode transfer medium, and the size of the outer side edge of the cathode sealing frame is equal to that of the proton exchange membrane; or
The proton exchange membrane is a sheet, and the anode sealing frame and the cathode sealing frame are sheets.
In the traditional preparation method of the membrane electrode of the hydrogen fuel cell, the efficiency of the single-chip transfer printing process is low. The CCM is produced by roll-to-roll continuous transfer printing, which is a production mode with higher efficiency.
In practical use, for the technology of continuously producing CCM in a roll-to-roll manner, if the cathode and anode catalyst layers are respectively and continuously coated or transferred on the two side surfaces of the proton exchange membrane coiled material to obtain the continuous full black CCM, and then when the continuous full black CCM is cut into sheets for use, the edge of the CCM is very easy to cause the microscopic overlapping of the cathode and anode catalysts due to cutting, so that the problem of short circuit of the cathode and anode is caused, the electrical output performance of the fuel cell is reduced, and the service life of the fuel cell is further influenced; if the positive and negative catalyst layers are coated or transferred on the surfaces of the two sides of the proton exchange membrane coiled material at intervals, the problem of the alignment precision of the active areas of the negative and positive electrodes on the two sides exists; in the scheme, the sizes of the conversion medium, the sealing frame and the proton exchange membrane are designed according to the use requirement, the catalyst layer covers the surface of one side of the conversion medium, and the transfer medium is limited by the inner frame of the sealing frame during transfer printing, so that the process is simple and has higher limiting precision; when cutting, the cutting part is arranged on the sealing frame far away from the cathode and anode catalyst layers, the micro-overlapping of the cathode and anode catalysts caused by cutting is well avoided, the process is simple and easy to realize, the production efficiency is high, the flexibility is high, both sheets and coiled materials can be used, and the method is suitable for large-scale production of membrane electrodes with different sizes.
Further, in step S4, the method for stripping the anode transfer medium and the cathode transfer medium comprises: and after cooling the semi-finished product of the membrane electrode for a preset time at the temperature of 20-25 ℃, stripping the anode transfer medium and the cathode transfer medium from the semi-finished product of the membrane electrode respectively according to the reverse direction of the roll feeding direction of the laminating machine.
According to another aspect of the present invention, a battery membrane electrode prepared by the above method for preparing a five-in-one hydrogen fuel cell membrane electrode is further provided, and includes the anode sealing frame, the anode catalyst layer, the proton exchange membrane, the cathode catalyst layer, and the cathode sealing frame, which are sequentially arranged, that is, the uppermost surface is the upper surface of the anode sealing frame, the second surface is the upper surface of the anode catalyst layer, the third surface is the upper surface of the proton exchange membrane (also the lower surface of the anode sealing frame and the lower surface of the anode catalyst layer), the fourth surface is the upper surface of the cathode catalyst layer (also the lower surface of the proton exchange membrane and the upper surface of the cathode sealing frame), and the fifth surface is the lower surface of the cathode sealing frame.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a process flow diagram of a method for preparing a membrane electrode of a penta-hydrogen fuel cell in an embodiment of the invention.
Wherein, 1 is an anode transfer medium, 2 is a cathode transfer medium, 3 is a proton exchange membrane, 4 is an anode sealing frame, and 5 is a cathode sealing frame.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout; the embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "lateral", "vertical", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, are not to be construed as limiting the present invention, and the scope of "XX-XX" described is a scope encompassing both values.
The invention provides a preparation method of a penta-hydrogen fuel cell membrane electrode, which comprises the steps of stacking an anode transfer medium with an anode catalyst layer, a cathode transfer medium with a cathode catalyst layer, an anode sealing frame, a cathode sealing frame and a proton exchange membrane according to a preset sequence, carrying out heat transfer laminating treatment by a laminating machine, and stripping the transfer medium to obtain a 5-layer membrane electrode with a sealing frame, wherein the scheme is characterized in that a CCM transfer printing process is realized and simultaneously an edge sealing integration process is completed by comprehensively arranging a material of the transfer printing medium, a base material and a material of a hot melt adhesive layer of the sealing frame, a solvent of the catalyst, the speed, the pressure, the roller diameter and the like during laminating through a large amount of experiments and researches, the problem of deformation of the proton exchange membrane caused by secondary processes of catalyst layer transfer and edge sealing integration processes is avoided, and the process is simple and easy to realize, the production efficiency is high, the flexibility is strong, and the method is suitable for the large-scale production of membrane electrodes with different sizes.
The method for producing a membrane electrode for a penta-hydrogen fuel cell and the membrane electrode according to the present invention will be described with reference to the accompanying drawings; fig. 1 is a process flow diagram of a method for preparing a membrane electrode of a penta-hydrogen fuel cell according to an embodiment of the present invention.
As shown in fig. 1, the method for preparing a membrane electrode for a penta-hydrogen fuel cell according to an embodiment of the present invention includes the steps of:
step S1, coating anode catalyst slurry on an anode transfer medium, and forming an anode catalyst layer on the anode transfer medium after drying; coating cathode catalyst slurry on a cathode transfer medium, and forming a cathode catalyst layer on the cathode transfer medium after drying;
step S2, stacking the anode transfer medium with the anode catalyst layer, the cathode transfer medium with the cathode catalyst layer, the anode sealing frame 4, the cathode sealing frame 5, and the proton exchange membrane 3 in a predetermined order to form a stacking unit, where the predetermined order is: the upper layer is an anode sealing frame 4 and the anode transfer medium with the anode catalyst layer arranged in the frame of the anode sealing frame 4, the middle layer is a proton exchange membrane 3, and the lower layer is a cathode sealing frame 5 and the cathode transfer medium arranged in the frame of the cathode sealing frame 5; wherein the side dimension of the anode transfer medium is equal to the inner side dimension of the anode sealing frame 4; the size of the side edge of the cathode transfer medium 2 is equal to the size of the inner side edge of the cathode sealing frame 5; the sizes of the outer sides of the anode sealing frame 4 and the cathode sealing frame 5 are both larger than or equal to the size of the side of the proton exchange membrane 3; the thickness of the anode sealing frame 4 is equal to that of the anode transfer medium with the anode catalytic layer, and the thickness of the cathode sealing frame 5 is equal to that of the cathode transfer medium with the cathode catalytic layer;
step S3, performing thermal transfer printing processing on the stacking unit, so that the anode catalyst layer and the cathode catalyst layer are respectively transferred onto the two side surfaces of the upper side and the lower side of the proton exchange membrane 3, and the anode sealing frame 4 and the cathode sealing frame 5 are pressed on the two side edges of the upper side and the lower side of the proton exchange membrane 3, thereby obtaining a membrane electrode semi-finished product;
and step S4, stripping the anode transfer medium and the cathode transfer medium from the membrane electrode semi-finished product to obtain the penta-hydrogen fuel cell membrane electrode.
According to the prior art in the background of the present patent, in the conventional membrane electrode preparation method, a catalyst is generally transferred to a proton exchange membrane 3 to obtain a 3-layer CCM (catalyst coated membrane), and then a sealing frame is attached to the edge of the proton exchange membrane 3, so that edge sealing is integrated to obtain a 5-layer membrane electrode with a frame, which can cause the problems of catalyst layer transfer and proton membrane deformation and the problem of cathode and anode active area alignment accuracy; the invention discloses a preparation method of a pentahapto hydrogen fuel cell membrane electrode, which is characterized in that an anode transfer medium with an anode catalyst layer, a cathode transfer medium with a cathode catalyst layer, an anode sealing frame 4, a cathode sealing frame 5 and a proton exchange membrane 3 are stacked according to a preset sequence, and then are subjected to heat transfer laminating treatment by a laminating machine, so that the transfer medium is peeled off, and a 5-layer membrane electrode with a sealing frame is obtained, through a large number of experiments and researches, by comprehensively arranging a material of a transfer medium, a base material and a material of a hot melt adhesive layer of the sealing frame, a solvent of a catalyst, the speed, the pressure, the roller diameter and the like during film laminating, an edge sealing integration procedure is completed while a CCM transfer procedure is realized, the problem of deformation of the proton exchange membrane 3 caused by secondary procedures of the catalyst layer transfer and edge sealing integration procedures is avoided, and the process is simple and easy to realize, the production efficiency is high, the flexibility is strong, and the method is suitable for the large-scale production of membrane electrodes with different sizes.
In addition, the preparation method of the membrane electrode of the penta-hydrogen fuel cell disclosed by the invention also has the following additional technical characteristics:
according to some embodiments of the present invention, the outer dimensions of the anode sealing frame 4 and the cathode sealing frame 5 are equal to the lateral dimensions of the proton exchange membrane 3.
According to some embodiments of the invention, the anodic transfer medium 1 and the cathodic transfer medium 2 are release films.
According to some embodiments of the present invention, the anodic transfer medium 1 is one of a PET, PI or PEN polymer film coated with a release agent; the cathode transfer medium 2 is one of PET, PI or PEN polymer films coated with a release agent.
According to some embodiments of the present invention, the base material of the anode sealing frame 4 is one of PET, PI, or PEN polymers, and the adhesive layer covering the surface of the anode sealing frame 4 is a hot melt adhesive layer with an adhesive function at 20-25 ℃; the base material of the cathode sealing frame 5 is one of PET, PI or PEN polymer, and the adhesive layer covering the surface of the cathode sealing frame 5 is a hot melt adhesive layer with an adhesive effect at 20-25 ℃.
According to some embodiments of the present invention, the base material of the anode sealing rim 4 is PEN polymer; the base material of the cathode sealing frame 5 is PEN polymer.
According to some embodiments of the invention, the adhesive layer covering the surface of the cathode sealing frame 5 material is an EVA adhesive film having an adhesive effect at normal temperature (20 ℃ -25 ℃); the glue layer covering the surface of the anode sealing frame 4 material is an EVA glue film with a bonding effect at normal temperature (20-25 ℃).
According to some embodiments of the invention, the solvent of the cathode catalyst slurry comprises at least one of ethylene glycol, propylene glycol, butylene glycol, t-butanol, pentylene glycol; the solvent of the anode catalyst slurry comprises at least one of ethylene glycol, propylene glycol, butanediol, tert-butyl alcohol and pentanediol; .
According to some embodiments of the invention, in step S1, the anode catalyst slurry is coated on the anode transfer medium by a Slot die Slot coater; the cathode catalyst slurry was coated on the cathode transfer media by a Slot die Slot coater.
According to some embodiments of the invention, in step S3, the laminating unit is subjected to a thermal transfer printing process by a laminator to obtain the semi-finished membrane electrode, wherein upper and lower rollers of the laminator are respectively a steel roller and a rubber roller, the thermal transfer printing speed is 1m/min to 10m/min, and the diameters of the rubber roller and the steel roller are 10mm to 100 mm; the laminating pressure of the laminating machine is 0.2MPa-0.5 MPa.
The upper roller and the lower roller of the laminating machine are respectively a steel roller and a rubber roller, the upper roller is a rigid roller, the lower roller is an elastic roller, and the upper roller and the lower roller are mutually matched through the two rollers, so that a workpiece can not be damaged, certain transfer pressure is guaranteed, and the transfer rate is effectively improved.
According to one embodiment of the invention, the thermal transfer speed is 2m/min, the diameters of the rubber roller and the steel roller are 50mm, and the bonding pressure of the laminator is 0.3Mpa, in other embodiments, the thermal transfer speed may also be 1m/min or 10m/min, the diameters of the rubber roller and the steel roller may also be 10mm or 100mm, and the bonding pressure of the laminator may also be 0.2Mpa or 0.5 Mpa.
According to some embodiments of the present invention, the proton exchange membrane 3 is a coiled material, the anode sealing frame 4 is a coiled material, and a plurality of anode inner frames are arranged at intervals on the anode sealing block, the side dimension of each anode inner frame is equal to the side dimension of the anode transfer medium 1, the outer side dimension of the anode sealing frame 4 is equal to the proton exchange membrane 3, the cathode sealing frame 5 is a coiled material, and a plurality of cathode inner frames are arranged at intervals on the cathode sealing block, the side dimension of each cathode inner frame is equal to the side dimension of the cathode transfer medium 2, and the outer side dimension of the cathode sealing frame 5 is equal to the proton exchange membrane 3; or
The proton exchange membrane 3 is a sheet, and the anode sealing frame 4 and the cathode sealing frame 5 are sheets.
In the traditional preparation method of the membrane electrode of the hydrogen fuel cell, the efficiency of the single-chip transfer printing process is low. The CCM is produced by roll-to-roll continuous transfer printing, which is a production mode with higher efficiency.
In practical use, for the technology of continuously producing CCM in a roll-to-roll manner, if the cathode and anode catalyst layers are respectively and continuously coated or transferred on the two side surfaces of the proton exchange membrane coiled material to obtain the continuous full black CCM, and then when the continuous full black CCM is cut into sheets for use, the edge of the CCM is very easy to cause the microscopic overlapping of the cathode and anode catalysts due to cutting, so that the problem of short circuit of the cathode and anode is caused, the electrical output performance of the fuel cell is reduced, and the service life of the fuel cell is further influenced; if the positive and negative catalyst layers are coated or transferred on the surfaces of the two sides of the proton exchange membrane coiled material at intervals, the problem of the alignment precision of the active areas of the negative and positive electrodes on the two sides exists; in the scheme, the sizes of the conversion medium, the sealing frame and the proton exchange membrane are designed according to the use requirement, the catalyst layer covers the surface of one side of the conversion medium, and the transfer medium is limited by the inner frame of the sealing frame during transfer printing, so that the process is simple and has higher limiting precision; when cutting, the cutting part is arranged on the sealing frame far away from the cathode and anode catalyst layers, the micro-overlapping of the cathode and anode catalysts caused by cutting is well avoided, the process is simple and easy to realize, the production efficiency is high, the flexibility is high, both sheets and coiled materials can be used, and the method is suitable for large-scale production of membrane electrodes with different sizes.
According to some embodiments of the invention, in step S4, the method of stripping the anodic transfer medium and the cathodic transfer medium: and after cooling the semi-finished product of the membrane electrode for a preset time at the temperature of 20-25 ℃, stripping the anode transfer medium and the cathode transfer medium from the semi-finished product of the membrane electrode respectively according to the reverse direction of the roll feeding direction of the laminating machine.
According to another aspect of the present invention, a battery membrane electrode prepared by the above method for preparing a five-in-one hydrogen fuel cell membrane electrode is further provided, and includes the anode sealing frame 4, the anode catalyst layer, the proton exchange membrane 3, the cathode catalyst layer, and the cathode sealing frame 5, which are sequentially arranged, that is, the uppermost surface is the upper surface of the anode sealing frame 4, the second surface is the upper surface of the anode catalyst layer, the third surface is the upper surface of the proton exchange membrane 3 (also the lower surface of the anode sealing frame 4 and the lower surface of the anode catalyst layer), the fourth surface is the upper surface of the cathode catalyst layer (also the lower surface of the proton exchange membrane 3 and the upper surface of the cathode sealing frame 5), and the fifth surface is the lower surface of the cathode sealing frame 5.
Any reference to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. This schematic representation in various places throughout this specification does not necessarily refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.
While specific embodiments of the invention have been described in detail with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention; in particular, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the invention; except variations and modifications in the component parts and/or arrangements, the scope of which is defined by the appended claims and equivalents thereof.
Claims (10)
1. A preparation method of a membrane electrode of a penta-hydrogen fuel cell is characterized by comprising the following steps:
step S1, coating anode catalyst slurry on an anode transfer medium, and forming an anode catalyst layer on the anode transfer medium after drying; coating cathode catalyst slurry on a cathode transfer medium, and forming a cathode catalyst layer on the cathode transfer medium after drying;
step S2, stacking the anode transfer medium with the anode catalyst layer, the cathode transfer medium with the cathode catalyst layer, an anode sealing frame, a cathode sealing frame, and a proton exchange membrane in a predetermined order to form a stacking unit, where the predetermined order is: the upper layer is an anode sealing frame and the anode transfer medium with the anode catalyst layer arranged in the frame of the anode sealing frame, the middle layer is a proton exchange membrane, and the lower layer is a cathode sealing frame and the cathode transfer medium arranged in the frame of the cathode sealing frame; wherein the side dimension of the anode transfer medium is equal to the inside dimension of the anode sealing frame; the size of the side edge of the cathode transfer medium is equal to the size of the inner side edge of the cathode sealing frame; the sizes of the outer side edges of the anode sealing frame and the cathode sealing frame are both larger than or equal to the size of the side edge of the proton exchange membrane; the thickness of the anode sealing frame is equal to that of the anode transfer medium with the anode catalysis layer, and the thickness of the cathode sealing frame is equal to that of the cathode transfer medium with the cathode catalysis layer;
step S3, performing heat transfer printing treatment on the stacking unit to transfer the anode catalyst layer and the cathode catalyst layer to the two side surfaces of the upper side and the lower side of the proton exchange membrane respectively, and simultaneously pressing the anode sealing frame and the cathode sealing frame on the two side edges of the upper side and the lower side of the proton exchange membrane to obtain a membrane electrode semi-finished product;
and step S4, stripping the anode transfer medium and the cathode transfer medium from the membrane electrode semi-finished product to obtain the penta-hydrogen fuel cell membrane electrode.
2. The method of making a penta-hydrogen fuel cell membrane electrode of claim 1, wherein the anode transfer media and the cathode transfer media are release films.
3. The method of making a penta-hydrogen fuel cell membrane electrode assembly according to claim 1 or 2, wherein the anode transfer medium is one of a PET, PI or PEN polymer film coated with a release agent; the cathode transfer medium is one of PET, PI or PEN polymer films coated with a release agent.
4. The method for preparing a membrane electrode assembly for a penta-hydrogen fuel cell according to claim 1, wherein the base material of the anode sealing frame is one of PET, PI or PEN polymers, and the adhesive layer covering the surface of the anode sealing frame is a hot-melt adhesive layer having an adhesive effect at 20 ℃ to 25 ℃; the base material of the cathode sealing frame is one of PET, PI or PEN polymer, and the adhesive layer covering the surface of the cathode sealing frame material is a hot melt adhesive layer with an adhesive effect at 20-25 ℃.
5. The method of making a penta-hydrogen fuel cell membrane electrode assembly according to claim 1, wherein the solvent of the cathode catalyst slurry comprises at least one of ethylene glycol, propylene glycol, butylene glycol, t-butanol, pentylene glycol; the solvent of the anode catalyst slurry comprises at least one of ethylene glycol, propylene glycol, butanediol, tert-butyl alcohol and pentanediol; .
6. The method for producing a membrane electrode assembly for a penta-hydrogen fuel cell according to claim 1, wherein in the step S1, the anode catalyst slurry is coated on the anode transfer medium by a slit coater; the cathode catalyst slurry was coated on the cathode transfer medium by a slit coater.
7. The method for preparing a penta-hydrogen fuel cell membrane electrode according to claim 1, wherein in step S3, the heat transfer printing treatment is performed on the stacking unit through a film laminating machine to obtain the semi-finished membrane electrode product, wherein the upper and lower rollers of the film laminating machine are respectively a steel roller and a rubber roller, the heat transfer printing speed is 1m/min-10m/min, and the diameters of the rubber roller and the steel roller are 10mm-100 mm; the laminating pressure of the laminating machine is 0.2MPa-0.5 MPa.
8. The method for preparing a membrane electrode assembly for a penta-hydrogen fuel cell according to claim 1 or 7, wherein the proton exchange membrane is a coiled material, the anode sealing frame is a coiled material, and a plurality of anode inner frames are arranged on the anode sealing block at intervals, the side dimension of each anode inner frame is equal to that of the anode transfer medium, the cathode sealing frame is a coiled material, and a plurality of cathode inner frames are arranged on the cathode sealing block at intervals, the side dimension of each cathode inner frame is equal to that of the cathode transfer medium; or
The proton exchange membrane is a sheet, and the anode sealing frame and the cathode sealing frame are sheets.
9. The method for producing a membrane electrode assembly for a penta-hydrogen fuel cell according to claim 7, wherein in step S4, the method for peeling the anode transfer medium and the cathode transfer medium:
and after cooling the semi-finished product of the membrane electrode for a preset time at the temperature of 20-25 ℃, stripping the anode transfer medium and the cathode transfer medium from the semi-finished product of the membrane electrode respectively according to the reverse direction of the roll feeding direction of the laminating machine.
10. A membrane electrode assembly for a fuel cell prepared by the method for preparing a membrane electrode assembly for a hydrogen penta-fuel cell according to any one of claims 1 to 9, comprising the anode sealing frame, the anode catalyst layer, the proton exchange membrane, the cathode catalyst layer and the cathode sealing frame, which are sequentially arranged.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116314982A (en) * | 2023-05-16 | 2023-06-23 | 武汉氢能与燃料电池产业技术研究院有限公司 | Proton exchange membrane fuel cell CCM production device and method based on transfer printing process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116314982A (en) * | 2023-05-16 | 2023-06-23 | 武汉氢能与燃料电池产业技术研究院有限公司 | Proton exchange membrane fuel cell CCM production device and method based on transfer printing process |
| CN116314982B (en) * | 2023-05-16 | 2023-08-11 | 武汉氢能与燃料电池产业技术研究院有限公司 | Proton exchange membrane fuel cell CCM production device and method based on transfer printing process |
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